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SIGNAL INTERCEPTION - A UNIFYING THEORETICAL FRAMEWORK FOR FEATURE DETECTION

IEEE TRANSACTIONS ON COMMUNICATIONS 1988年第8期36卷 897-906页

作者： GARDNER, WA Signal and Image Processing Laboratory Department of Electrical Engineering and Computer Science University of California Davis CA USA

The unifying framework of the spectral-correlation theory of cyclostationary signals is used to present a broad treatment of weak, random signal detection for interception purposes. The relationships among a variety of previously proposed ad hoc detectors, optimum detectors, and newly proposed detectors are established. The spectral-correlation-plane approach to the interception problem is put forth as especially promising for detection, classification, and estimation in particularly difficult environments involving unknown and changing noise levels and interference activity. A fundamental drawback of the popular radiometric methods in such environments is explained.

关键词： Cyclostationary signal Environments Frameworks Unknown interceptions RANDOM SIGNALS feature detections correlation theory

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IMAGE DATA-COMPRESSION - A REVIEW

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PROCEEDINGS OF THE IEEE 1981年第3期69卷 349-389页

作者： JAIN, AK Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis CA USA

With the continuing growth of modern communications technology, demand for image transmission and storage is increasing rapidly. Advances in computer technology for mass storage and digital processing have paved the way for implementing advanced data compression techniques to improve the efficiency of transmission and storage of images. In this paper a large variety of algorithms for image data compression are considered. Starting with simple techniques of sampling and pulse code modulation (PCM), state of the art algorithms for two-dimensional data transmission are reviewed. Topics covered include differential PCM (DPCM) and predictive coding, transform coding, hybrid coding, interframe coding, adaptive techniques, and applications. Effects of channel errors and other miscellaneous related topics are also considered. While most of the examples and image models have been specialized for visual images, the techniques discussed here could be easily adapted more generally for multidimensional data compression. Our emphasis here is on fundamentals of the various techniques. A comprehensive bibliography with comments is included for a reader interested in further details of the theoretical and experimental results discussed here.

关键词： Data compression Image storage Pulse modulation Communications technology Image communication Image sampling Modulation coding Data communication Predictive coding Bibliographies

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NONSTATIONARY LEARNING CHARACTERISTICS OF THE LMS ALGORITHM

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS 1987年第10期34卷 1199-1207页

作者： GARDNER, WA Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis USA

Upper and lower bounding first-order linear recursions for the mean-squared error realized with the LMS algorithm subjected to a sequence of independent nonstationary training vectors are derived. These bounds coincide to give the exact evolution of mean-squared error for the problem of identification of a nonrecursive time-varying system with white-noise excitation. This leads to an exact formula for time-averaged mean-squared error that is used to study optimization of the step-size parameter for minimum time-average misadjustment. New results on dependence of the minimal step size and the minimum misadjustment on the degree of nonstationarity are obtained.

关键词： Least squares approximation System identification Adaptive filters Algorithm design and analysis Vectors Time varying systems Gaussian distribution Signal processing Image processing

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ON THE SPECTRUM OF PSEUDO NOISE

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PROCEEDINGS OF THE IEEE 1986年第4期74卷 608-609页

作者： GARDNER, WA CHEN, CK Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis CA USA

Although the magnitude of the discrete Fourier transform of a maximal-length shift-register sequence is flat, except for its value at zero frequency, the higher resolution spectral content given by the Fourier-series transform is highly erratic. This little-known fact is described, and its ramifications on fast Fourier transforms of one-digit-extended pseudo noise and zero-padded pseudo noise are explained.

关键词： Discrete Fourier transforms Autocorrelation Frequency Interpolation Fourier transforms White noise Fast Fourier transforms Prediction algorithms Fourier series Signal processing

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Asynchronous Tag-based Physical-Layer Authentication in Wireless Communications

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IEEE Transactions on Wireless Communications 2025年

作者： Tan, Haijun Xu, Yuntao Du, Jiewei Xie, Ning Li, Hongbin Peng Cheng Laboratory Control and Network Foundation Laboratory Frontier Research Center Shenzhen518107 China Shenzhen University State Key Laboratory of Radio Frequency Heterogeneous Integration The Guangdong Key Laboratory of Intelligent Information Processing College of Electronics and Information Engineering Shenzhen518060 China Beijing Jiaotong University School of Electronic and Information Engineering Beijing100044 China National Innovation Center of High Speed Train Qingdao266111 China Stevens Institute of Technology Department of Electrical and Computer Engineering HobokenNJ07030 United States

Tag-based physical-layer authentication (PLA) has gained significant research interest due to its high security and low complexity compared to traditional upper-layer authentication mechanisms. However, conventional tag-based PLA schemes often require strict synchronization between the tag and the source message before transmission, which may limit their practicality and effectiveness. To address this limitation, we propose an asynchronous tag-based PLA scheme, where the tag and the source message are transmitted asynchronously with an intentional time delay introduced at the transmitter. The proposed scheme enhances both compatibility and security without compromising robustness. We provide a theoretical analysis of the proposed scheme, and derive closed-form expressions to characterize its performance. Furthermore, theoretical comparisons with existing methods yield insightful conclusions regarding the advantages of the proposed approach. The scheme is implemented and extensively evaluated through simulations, where the theoretical results exhibit strong agreement with the simulation outcomes, thereby validating its effectiveness. © 2025 IEEE.

关键词： asynchronous closed form intentional timing delay Physical-layer authentication tag-based

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AN ALTERNATIVE ADAPTIVE SEQUENTIAL REGRESSION ALGORITHM AND ITS APPLICATION TO THE RECOGNITION OF CEREBRAL-PALSY SPEECH

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS 1987年第7期34卷 782-787页

作者： DELLER, JR DONG, H Digital Signal Processing Laboratory Speech Processing Sector Department of Electrical and Computer Engineering Northeastern University Boston MA USA

An algorithm is presented which can be used to compute a temporally adaptive, recursive solution to the problem of estimating the linear prediction parameters of speech. The method is theoretically equivalent to conventional adaptive sequential regression, but is slightly more efficient and computationally much more straightforward. Application to the problem of recognition of speech of the profoundly disabled is discussed.

关键词： Speech recognition Birth disorders Equations Signal processing algorithms Recursive estimation Speech analysis Least squares methods Speech processing Parameter estimation

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Use of PARADISE: A meta-tool for visualizing parallel systems 5

Use of PARADISE: A meta-tool for visualizing parallel system...

引用

5th International parallel processing Symposium, IPPS 1991

作者： Kohl, James Arthur Casavant, Thomas L. Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa CityIA52242 United States

ISBN: (纸本)0818691670

This paper addresses the problem of creating software tools for visualizing the dynamic behavior of parallel applications and systems. PARADISE (parallel Animated Debugging and Simulation Environment) approaches this problem by providing a meta-tool environment for generating custom visual analysis tools. PARADISE is a meta-tool because it is a tool which is utilized to create other tools. This paper focuses on the user's view of the use of PARADISE for constructing tools which analyze the interaction between parallel systems and parallel applications. An example of its use, involving the PASM parallel processing System, is given. © 1991 IEEE.

关键词： parallel processing systems

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A software engineering, visualization methodology for parallel processing systems 16

A software engineering, visualization methodology for parall...

引用

16th Annual International computer Software and Applications Conference, COMPSAC 1992

作者： Kohl, James Arthur Casavant, Thomas L. Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa CityIA52242 United States

ISBN: (纸本)0818630000

This paper focuses on techniques for enhancing the feasibility of using graphic visualization in analyzing the complexities of parallel software. The central drawback to applying such visual techniques is the overhead in developing analysis tools with flexible, customized views. The PARADISE (parallel Animated Debugging and Simulation Environment) system, which has been in operation since 1989, alleviates some of this design overhead by providing an abstract, object-oriented, visual modeling environment which expedites custom visual tool development. PARADISE is a visual tool which is used to develop other visual tools, or a meta-tool. This paper complements previous work on PARADISE by describing the philosophy behind its design, and how that philosophy leads to a methodology for constructing visual models which characterize parallel systems in general. Emphasis will be on the crucial issues in utilizing visualization for parallel software development, and how PARADISE deals with these issues. © 1992 IEEE.

关键词： parallel processing systems

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Plasma immersion ion implantation with dielectric substrates

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IEEE TRANSACTIONS ON PLASMA SCIENCE 1996年第6期24卷 1383-1388页

作者： Linder, BP Cheung, NW Plasma Assisted Materials Processing Laboratory Department of Electrical Engineering and Computer Science University of California Berkeley CA USA

Plasma immersion ion implantation (Pm) is a novel implantation technique for high-dose/high-current implants. Using the SPICE circuit simulator to model the PIII process, the sheath voltage and ion energy distribution are examined. Implanting into a dielectric substrate results in a significant voltage buildup in the wafer, reducing the effective implant energy. Increasing the pulse voltage raises the dose/pulse, but at the cost of an expanded implant energy spread. Increasing the plasma ion density also raises the dose/pulse, but at the cost of a wider implant energy spread and a lower coupling efficiency. Increasing the substrate thickness reduces both the coupling efficiency and dose/pulse while broadening the energy spread. The large voltage generated across the dielectric substrate decreases the charge neutralization time significantly, reducing the possibility of gate oxide damage.

关键词： Plasma immersion ion implantation gate oxide Implants and Prostheses circuit simulator Dielectric substrates Shock voltage Ion energy distribution ion densities

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PATH PLANNING FOR MOBILE MANIPULATORS FOR MULTIPLE TASK EXECUTION

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IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION 1991年第3期7卷 403-408页

作者： CARRIKER, WF KHOSLA, PK KROGH, BH Laboratory for Automated Systems and Information Processing Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA USA

We consider the planning problem for a mobile manipulator system that must perform a sequence of tasks defined by position, orientation, force, and moment vectors at the end-effector. Each task can be performed in multiple configurations due to the redundancy introduced by mobility. We formulate the planning problem as an optimization problem in which the decision variables for mobility (base position) are separated from the manipulator joint angles in the cost function. The resulting numerical problem is nonlinear with nonconvex, unconnected feasible regions in the decision space. Simulated annealing is proposed as a general solution method for obtaining near-optimal results. The problem formulation and numerical solution by simulated annealing are illustrated for a manipulator system with three degrees of freedom mounted on a base with two degrees of freedom. These results are compared with results obtained by conventional nonlinear programming techniques customized for the particular example system.

关键词： Path planning Simulated annealing Cost function Numerical simulation Space stations Robotics and automation Manipulators Trajectory Constraint optimization Ear

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